Deep cushioned back and seat conform to body contours for proper alignment, posture and all-day comfort. Curved polyurethane loop arms are soft yet durable. Meets or exceeds ANSI/BIFMA standards. Pneumatic seat height adjustment. 360å¡ swivel. Tilt tension and tilt lock controls. Black five-star base with hooded casters. Chair Type: Rolling Chair; Folding/Stacking: NA; Width: NA; Depth: NA. Deep cushioned back and seat conform to body contours for proper alignment. Curved polyurethane loop arms are soft, yet durable. Seat height adjusts to accommodate different users comfort levels. Five-star base with hooded casters. (alternative casters are available) Alternative casters are available to meet your specific needs.